With the other hand, hold a clean collection cup or breast milk storage bottle under your breast so that your nipple is directly above it. (verywellfamily.com)
If you are like me who use storage bottles instead of bags then I guess you should also consider this. (celerhinaaubrey.com)
Each evening once I arrive home from work, I place the day's pumped milk storage bottles in the refrigerator, to be used for preparing the next day's daycare bottles. (sortacrunchy.net)